JVC XM-PX50WT Service Manual page 20

XM-PX50WT
AK93C55BH-W (IC502) : EEPROM
1. Pin layout
CS 1
SK 2
DI
3
DO
4
3. Block diagram
DI
INSTRUCTION
REGISTER
CS
SK
PE
TC75S51F-X(IC505):Ope amp
1.Pin layout/Block diagram
VDD
5
1
IN(+) Vss IN(-)
1-20
8 VCC
7 NC
6 PE
5 GND
INSTRUCTION
DECODE,
CONTROL
AND
CLOCK
GENERATION
OUT
4
2 3
2.Pin function
Pin name
Chip select
CS
Serial data clock
SK
Serial data input
DI
Serial data output
DO
PE Program enable
VCC Ground
GND Power supply
NC Not connected
DATA
REGISTER
16
R/W AMPS
AND
AUTO ERASE
ADD.
DECODER
BUFFER
VPP SW
GENERATOR
VREF
Fnction
DO
16
EEPROM
2048bit
128 X 16
VPP